2891660456 has 16 divisors (see below), whose sum is σ = 5422658400. Its totient is φ = 1445618224.

The previous prime is 2891660449. The next prime is 2891660461. The reversal of 2891660456 is 6540661982.

2891660456 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 2891660456.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 41831 + ... + 86793.

It is an arithmetic number, because the mean of its divisors is an integer number (338916150).

Almost surely, 2^2891660456 is an apocalyptic number.

It is an amenable number.

2891660456 is a deficient number, since it is larger than the sum of its proper divisors (2530997944).

2891660456 is a wasteful number, since it uses less digits than its factorization.

2891660456 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53008 (or 53004 counting only the distinct ones).

The product of its (nonzero) digits is 622080, while the sum is 47.

The square root of 2891660456 is about 53774.1616020185. The cubic root of 2891660456 is about 1424.6748749999.

The spelling of 2891660456 in words is "two billion, eight hundred ninety-one million, six hundred sixty thousand, four hundred fifty-six".